Mitsubishi Electric SUZ-SM35VA Technical & Service Manual Download Page 33

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OCH779

11-6-2. Inverter P.C. board

SUZ-SM60VA.TH

−

100

Temperature( )

Defrost thermistor(RT61)

Ambient temperature thermistor(RT65)

Outdoor heat exchanger temperature thermistor(RT68)

Temperature( )

Discharge temperature thermistor(RT62)

10 20 30 40 50 60 70 80 90 100 110 120

100

200

300

400

500

600

700

0 10 20 30 40 50 60 70 80

100

120

140

160

180

200

Temperature( )

Fin temperature thermistor(RT64)

Resistance(k )

Fin temperature

thermistor/RT64

(CN673)

Ambient temperature

thermistor/RT65

(CN672)

Discharge temperature

thermistor/RT62

(CN671)

Defrost thermistor

/RT61 (CN671)

Output to

drive outdoor

fan motor

(CN932)

Outdoor heat exchanger

temperature thermistor

/RT68 (CN671)

Fuse (F901)

T3.15AL250V

Fuse (F880)

T3.15AL250V

LEV (CN724)

Jumper wire for

changing defrost

setting (JS)

Jumper wire for

pre-heat control

setting (JK)

Fuse (F601)

T3.15AL250V

Signal of out-

door fan motor

(CN931)

R.V. coil (CN602)

230 V AC

260 - 370 V DC

IC700 (N)

IC700 (P)

LED

Summary of Contents for SUZ-SM35VA

Page 1: ... Note This service manual describes service data of the outdoor units only CONTENTS 1 COMBINATION OF INDOOR AND OUTDOOR UNITS 2 2 SAFETY PRECAUTION 3 3 PARTS NAMES AND FUNCTIONS 9 4 SPECIFICATION 10 5 NOISE CRITERIA CURVES 12 6 OUTLINES AND DIMENSIONS 13 7 WIRING DIAGRAM 15 8 REFRIGERANT SYSTEM DIAGRAM 18 9 ACTUATOR CONTROL 21 10 SERVICE FUNCTIONS 22 11 TROUBLESHOOTING 22 12 DISASSEMBLY PROCEDURE ...

Page 2: ...rant leaks If refrigerant leaks into the room and comes into contact with the flame of a heater or portable cooking range poisonous gases will be released 9 Do not use low temperature solder alloy in the case of brazing the refrigerant pipes 10 When performing brazing work be sure to ventilate the room sufficiently Make sure that there are no hazardous or flammable materials nearby When performing...

Page 3: ...scharge the condenser before the work involving the electric parts Handle tools with care If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of compressor Use the specified refrigerant only Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is being used serviced or dis...

Page 4: ...he Refrigeration Equipment Where electrical components are being changed they shall be fit for the purpose and to the correct specification At all times the manufacturer s maintenance and service guidelines shall be followed If in doubt consult the manufacturer s technical department for assistance The following checks shall be applied to installations using flammable refrigerants The charge size ...

Page 5: ... procedures shall be used However for flammable refrigerants it is important that best practice is followed since flammability is a considera tion The following procedure shall be adhered to remove refrigerant purge the circuit with inert gas evacuate purge again with inert gas open the circuit by cutting or brazing The refrigerant charge shall be recovered into the correct recovery cylinders For ...

Page 6: ...ith pressure relief valve and associated shut off valves in good working order Empty recovery cylinders are evacuated and if possible cooled before recovery occurs The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of all appropriate refrigerants including when applicable flammable refrige...

Page 7: ... B Install in a space with a depression height of 0 125 m C Create an appropriate ventilation open area Make sure that the width of the open area is 0 9 m or more and the height of the open area is 0 15 m or more However the height from the bottom of the installation space to the bottom edge of the open area should be 0 125 m or less Open area should be 75 or more opening Amin Height from the bott...

Page 8: ...efer to the installation manual Install the indoor unit so that the height from the floor to the bottom of the indoor unit is h0 for ceiling suspended cassette and ceiling concealed 2 2 m or more There are restrictions in installation height for each model so read the installation manual for the particular unit Case 1 ceiling concealed Ceiling concealed h0 2 2 m M kg Amin m 1 0 4 1 5 6 2 0 8 2 5 1...

Page 9: ...UZ SM50VA TH Model SUZ SM VA Drain socket 1 Air outlet Drain outlet Piping Drain hose Air inlet back and side SUZ SM60VA TH Air outlet Drain outlet Piping Drain hose Air inlet back and side Air outlet Drain outlet Piping Drain hose Air inlet back and side ...

Page 10: ... 0 8 0 9 3 Refrigeration oil Model L 0 35 FW68S Fan motor Model RC0J50 NC RC0J50 RA RC0J60 BC Current Cooling A 0 20 0 29 0 84 Heating 0 23 0 29 0 84 Dimensions W H D mm 800 550 285 800 714 285 840 880 330 Weight kg 35 41 54 Special remarks Air flow Cooling High m h 2 058 2 748 3 006 Low 906 1 320 1 716 Heating High 1 962 2 622 3 006 Med 1 686 2 238 2 892 Low 1 260 1 704 2 280 Sound pressure level...

Page 11: ...A 600 V Fuse F61 25 A 250 V F62 15 A 250 V F701 F801 F901 T3 15 A L250 V F601 F880 F901 T3 15 A L250 V Power module IC700 15 A 600 V 20 A 600 V IC932 5 A 600 V Switch power transistor Q821 30 A 600 V Expansion valve coil LEV 12 V DC Reactor L61 23 mH L 282 μH Diode D3A D3B 20 A 600 V Diode module DB41A DB41B 20 A 600 V Current Limiting PTC thermistor PTC64 PTC65 33Ω Terminal block TB1 5P 3P Relay ...

Page 12: ...RESSURE LEVEL dB re 0 0002 MICRO BAR 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 BAND CENTER FREQUENCIES Hz NC 10 SUZ SM50VA TH Test conditions Cooling Dry bulb temperature 35 C Heating Dry bulb temperature 7 C Wet bulb temperature 6 C OUTDOOR UNIT MICROPHONE 1 m SUZ SM60VA TH OCTAVE BAND SOUND PRESSURE LEVEL 0dB re 0 0002 MICRO BAR COOLING FUN...

Page 13: ...13 OCH779 mm inch mm inch 6 OUTLINES AND DIMENSIONS Unit mm SUZ SM35VA TH Unit mm SUZ SM50VA TH ...

Page 14: ...52 Service panel 99 5 164 5 195 3 5 4 4 Liquid refrigerant pipe joint Gas refrigerant pipe joint Air in 350 mm or more 100 mm or more REQUIRED SPACE 100 mm or more 500 mm or more 2 1 500 mm or more when front and sides of the unit are clear 2 When any 2 sides of left right and rear of the unit are clear Clear 1 Unit mm ...

Page 15: ...15 OCH779 15 7 WIRING DIAGRAM SUZ SM35VA TH ...

Page 16: ...16 OCH779 SUZ SM50VA TH ...

Page 17: ...17 OCH779 SUZ SM60VA TH ...

Page 18: ... 0 240 Outdoor heat exchanger temperature thermistor RT68 Muffler Outdoor heat exchanger LEV Strainer 50 Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve with strainer Stop valve with service port Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow in heating Refrigerant pipe ø9 52 with heat insulato...

Page 19: ...4 0 ø2 4 100 Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow in heating Refrigerant pipe ø15 88 with heat insulator Refrigerant pipe ø6 35 with heat insulator LEV R V coil heating ON cooling OFF Muffler Strainer 100 Outdoor heat exchanger temperature thermistor RT68 Ambient temperature thermistor RT65 Strainer 100 Strainer 50 Strainer 100 Muffler Capillary tube ø3 0 ø2 0 200 6 ...

Page 20: ...orm the refrigerant collecting operation cooling test run For the PAR 4xMAA x represents 0 or later select Service Test Run from the main menu to start the test run and then select the cooling mode For details or for other information about starting the test run when using remote controllers refer to the installation manual for the indoor unit or the remote controller 6 Fully close the stop valve ...

Page 21: ...n motor turns OFF 15 seconds after the compressor has stopped running NOTE The 4 way valve reverses for 5 seconds right before startup of the compressor Sensor Purpose Actuator Compressor LEV Outdoor fan motor R V coil Indoor fan motor Discharge temperature thermistor Protection Indoor coil temperature thermistor Cooling Coil frost prevention Heating High pressure protection Defrost thermistor Hea...

Page 22: ...IS 11 1 CAUTIONS ON TROUBLESHOOTING 1 Before troubleshooting check the following items 1 Check the power supply voltage 2 Check the indoor outdoor connecting wire for miswiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller and turn off the breaker 2 Be sure to turn OFF the power supply before ...

Page 23: ...ltage of inverter cannot be detected normally Refer to 11 5 How to check in verter compressor 16 Outdoor unit operates 1 time blink 2 5 seconds OFF Frequency drop by current protection When the input current exceeds approximately 8A SM35 12A SM50 14A SM60 compressor The unit is normal but check the following Check if indoor filters are clogged Check if refrigerant is short Check if indoor outdoor ...

Page 24: ...unit outdoor unit etc Symptom 1 Indoor outdoor unit communication error 2 Transmitting error Outdoor unit 3 Open short of outdoor unit thermistors UP U3 U4 PL or others 14 Abnormlity of refrigerant circuit or other errors Refer to the technical manual for the outdoor unit 12 14 Fb FB PL Indoor unit control system error memory error etc E0 E3 E1 E2 Remote controller control board error Remote contr...

Page 25: ... tester Before measurement hold the thermistor with your hands to warm it up Refer to 11 6 Test point diagram and voltage 11 6 1 SM35 50 or 11 6 2 SM60 Inverter P C board for the chart of thermistor Defrost thermistor RT61 Fin temperature thermistor RT64 32 to 43 Ω Measure the resistance between terminals with a tester Temperature 10 to 40 C Compressor U V U W V W Normal W U V WH RD BK W U V WH RD...

Page 26: ...he test run and then select the cooling mode For details or for other information about starting the test run when using remote controllers refer to the installation manual for the indoor unit or the remote controller Measurement point At 3 points BK U WH V BK U RD W WH V RD W NOTE 1 Output voltage varies according to power supply voltage 2 Measure the voltage by analog type tester 3 During this c...

Page 27: ...easurement Measure the time from the start of compressor to the stop of compressor due to overcurrent Is the resistance of thermistor normal M25 35 50 Refer to 11 6 1 M60 71 11 6 2 Disconnect the connector of thermistor in the outdoor P C board see below table and measure the resistance of thermistor Replace the thermistor except RT64 When RT64 is abnormal replace the inverter P C board Reconnect ...

Page 28: ...T mode even if it is set to COOL mode Disconnect connector between the compressor and the intelligent power module Turn ON the power supply and start heating test run TEST RUN OPERATION Refer to 11 5 Disconnect connector between the compressor and the intelligent power module Turn ON the power supply and start cooling test run TEST RUN OPERATION Refer to 11 5 H Check of outdoor fan motor Is the re...

Page 29: ...ith a hand Yes Check the outdoor fan motor Refer to Is the fuse F901 blown on the in verter P C board Check the connection of the connectors CN931 CN932 of the outdoor fan mo tor If the connection is poor correct it Operate the outdoor unit by starting EMERGENCY OPERATION Check the LED indication on the in verter P C board Does the LED blink 10 times Replace the inverter P C board Check the corres...

Page 30: ... or the installation condition combination of specific conditions such as antennas or wiring Check the following before asking for service 1 Devices affected by the electromagnetic noise TV sets radios FM AM broadcast shortwave 2 Channel frequency broadcast station affected by the electromagnetic noise 3 Channel frequency broadcast station unaffected by the electromagnetic noise 4 Layout of indoor...

Page 31: ... Yes The refrigerant gas amount may be 60 or less than the normal amount Identify where the gas is leaking from and fix the leak No CAUTION Do not start the operation again to prevent hazards The operation has stopped to prevent the diesel explosion caused by air trapped in the refrigerant circuit Close the stop valve and disconnect the power plug or turn the breaker OFF Note If the abnormality ca...

Page 32: ...00110120 Fin temperature thermistor RT64 CN642 Ambient temperature thermistor RT65 CN643 Discharge temperature thermistor RT62 CN641 Defrost thermistor RT61 CN641 DB61 260 370 V DC Front side of unit 230 V AC Output to drive compressor LDU LDV LDW Fuse F701 T3 15AL250V R V coil CN721 230 V AC Jumper wire for changing defrost setting JS Signal of outdoor fan motor CN931 230 V AC Outdoor heat exchan...

Page 33: ...0 200 Temperature Fin temperature thermistor RT64 Resistance k Resistance k Resistance k Fin temperature thermistor RT64 CN673 Ambient temperature thermistor RT65 CN672 Discharge temperature thermistor RT62 CN671 Defrost thermistor RT61 CN671 Output to drive outdoor fan motor CN932 Outdoor heat exchanger temperature thermistor RT68 CN671 Fuse F901 T3 15AL250V Fuse F880 T3 15AL250V LEV CN724 Jumper...

Page 34: ...visible parts in the photos figures Indicates the invisible parts in the photos figures NOTE Turn OFF the power supply before disassembly OPERATING PROCEDURE PHOTOS FIGURES 1 Removing the cabinet 1 Remove the screw fixing the service panel 2 Pull down the service panel and remove it 3 Disconnect the power supply cord and indoor outdoor connecting wire 4 Remove the screws fixing the top panel 5 Rem...

Page 35: ...the cabinet and panels Refer to section 1 2 Disconnect the following connectors Inverter P C board CN721 R V coil 3 Remove the R V coil 4 Removing the discharge temperature thermistor defrost thermistor outdoor heat exchanger tempera ture thermistor and ambient temperature thermistor 1 Remove the cabinet and panels Refer to section 1 2 Disconnect the lead wire to the reactor and the following con ...

Page 36: ...on 1 2 Remove the inverter assembly Refer to section 2 3 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0 MPa 4 Detach the brazed part of the suction and the discharge pipe connected with compressor 5 Remove the nuts of compressor legs 6 Remove the compressor 7 Detach the brazed part of pipes connected with 4 way valve 7 Removing th...

Page 37: ...panel 5 Remove the top panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel Photo 2 Photo 1 Screws of the cabinet Screws of the top panel Screws of the cabinet Screws of the top panel Screw of the back panel Screws of the service panel ...

Page 38: ...onnect the lead wires of the heat exchanger temperature thermistor the defrost thermistor and discharge tempera ture thermistor to the connector on the inverter P C board Pull the lead wires toward you and put them on the right hook on the P C board support 2 Connect the lead wires of the LEV to the connector on the inverter P C board Pull the lead wires toward you and put them on the right hook o...

Page 39: ...stor CN644 Outdoor heat exchanger temperature thermistor 3 Pull out the discharge temperature thermistor from its holder 4 Pull out the defrost thermistor from its holder 5 Pull out the outdoor heat exchanger temperature thermistor from its holder 6 Pull out the ambient temperature thermistor from its holder 5 Removing outdoor fan motor 1 Remove the cabinet and panels Refer to section 1 2 Disconne...

Page 40: ...as from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0 MPa 4 Detach the brazed part of the suction and the discharge pipe connected with compressor 5 Remove the compressor nuts 6 Remove the compressor 7 Detach the brazed part of pipes connected with 4 way valve Photo 9 Brazed parts of 4 way valve Suction pipe brazed part Discharge pipe brazed part...

Page 41: ...ove the top panel 6 Remove the valve cover 7 Disconnect the power supply and indoor outdoor connect ing wire 8 Remove the screws of the cabinet 9 Remove the cabinet 10 Remove the screws of the back panel 11 Remove the back panel Photo 2 Photo 1 Screws of the cabinet Screws of the top panel Screws of the cabinet Screws of the top panel Screw of the back panel Screws of the cabinet Screws of the ser...

Page 42: ...es and the lead wires of the inverter P C board 5 Remove the screws of the P B support 6 Remove the P B support from the relay panel 7 Remove the screws of the inverter P C board 8 Remove the inverter P C board from P B support Notes about attaching the inverter P C board 1 When attaching the inverter P C board clip the lead wires of the reactor to the wire saddles on the bottom of relay panel 2 A...

Page 43: ...lead wire to the reactor and the following connectors Inverter P C board CN671 Defrost thermistor discharge temperature thermis tor and outdoor heat exchanger temperature ther mistor CN672 Ambient temperature thermistor 3 Pull out the discharge temperature thermistor from its hold er Photo 8 4 Pull out the defrost thermistor from its holder 5 Pull out the outdoor heat exchanger temperature thermis...

Page 44: ...l Refer to 1 2 Remove the back panel Refer to 1 3 Remove the screws fixing the relay panel 4 Remove the relay panel 5 Remove the inverter assembly Refer to 2 6 Recover gas from the refrigerant circuit NOTE Recover gas from the pipes until the pressure gauge shows 0 kg cm2 0 MPa 7 Detach the brazed part of the suction and the discharge pipe connected with compressor 8 Remove the compressor nuts 9 R...

Page 45: ...ction except for the ON OFF button 6 ON OFF lamp This lamp lights up in green while the unit is in operation It blinks while the remote controller is starting up or when there is an error 7 Function button F1 Main display Press to change the operation mode Menu screen The button function varies with the screen 8 Function button F2 Main display Press to decrease temperature Main menu Press to move ...

Page 46: ...ol Set temp Auto Basic mode Fri Cool Mode Temp Fan Set temp Auto 2 1 5 6 7 8 9 0 1 3 9 4 2 3 4 5 6 7 2 1 5 Display 4 3 8 4 Appears when the Weekly timer is enabled 5 Appears while the units are operated in the energy saving mode Will not appear on some models of indoor units 6 Appears while the outdoor units are operated in the silent mode 7 Appears when the built in thermistor on the remote contr...

Page 47: ... OFF timer Auto return Clock Main Sub Temp range Auto OFF timer Schedule Daylight saving time Clock Administrator password Operation locked 3D i See sensor Horizontal air direction High power Vane 3D i See Vent Lossnay Comfort Timer Energy saving Basic setting Display setting Operation setting Restriction Weekly timer OU silent mode Timer menu Main display Display details Contrast Brightness Langu...

Page 48: ... input Function setting Rotation setting Maintenance password Dealer information input Error information Test run menu Maintenance information Filter information Cleaning Settings menu Check menu Other menu Auto descending panel Descending operation Self check Descending adjustment Remote controller check Continue from the previous page Not all functions are available on all models of indoor units...

Page 49: ...elect the desired silent level from Normal Middle and Quiet Night setback 1 Use to make Night setback settings Select Yes to enable the setting and No to disable the setting The temperature range and the start stop times can be set Energy saving Restriction Temp range 2 Use to restrict the preset temperature range Different temperature ranges can be set for different operation modes Operation lock...

Page 50: ...layed The model name manufacturing number and contact information need to be registered in advance to be displayed Filter information Use to check the filter status The filter sign can be reset Cleaning Auto descending panel Use to lift and lower the auto descending panel Optional parts Service Test run Select Test run from the Service menu to bring up the Test run menu Test run Drain pump test ru...

Page 51: ...ignal transmitted from the remote controller has been received Signals can be received up to approximately 7 meters in a direct line from the indoor unit in an area 45 to the left and right of the unit However illumination such as fluorescent lights and strong light can affect the ability of the indoor unit to receive signals If the operation lamp near the receiver on the indoor unit is blinking t...

Page 52: ...ing Auto Set Temperature buttons Weekly timer ON OFF button Set Time button Sets the time Airflow button Changes up down airflow direction Mode button Changes operation mode Timer ON button Timer OFF button OFF ON button Fan Speed button Changes fan speed SET SEND button CANCEL button Up Down buttons Menu button i see button Reset button Remote controller display Transmission area 3D i See sensor ...

Page 53: ...l name and serial number will appear The model name and serial number will appear only if the informa tion have been registered Press the F1 or F2 button to go to the next page When an error occurs the following screen will appear Check the error status stop the operation and consult your dealer Contact information dealer s phone number will appear if the information has been registered 2 Press th...

Page 54: ...ormation Filter information Cleaning While no errors are occurring page 2 2 of the error information can be viewed by selecting Error information from the Maintenance menu Errors cannot be reset from this screen Checking the error information F1 F2 F3 F4 ...

Page 55: ...ntenance password is required 3 If the password matches the Service menu will appear The type of menu that appears depends on the connected indoor units type A screen will appear that indicates the setting has been saved Navigating through the screens To go back to the Service menu button To return to the previous screen button Note The initial maintenance password is 9999 Change the default passw...

Page 56: ...ss the F1 button to go through the operation modes in the order of Cool and Heat Check the auto vane with the F1 F2 F3 buttons Press the button to return to Test run operation Press the button When the test run is completed the Test run menu screen will appear The test run will automatically stop after 2 hours The function is available only for the model with vanes Test run operation Auto vane che...

Page 57: ... from the unit 6 Press the VANE button and check whether the auto vane operates properly 7 Press the ON OFF button to stop the test run Note Point the remote controller towards the indoor unit receiver while following steps 2 to 7 It is not possible to run in FAN DRY or AUTO mode 1 A B 2 3 13 4 3 PAR SL100A E 1 Press the button 1 to stop the air conditioner If the weekly timer is enabled is on pre...

Page 58: ...Non highlighted items indicate that no function settings are made Screen appearance varies depending on the Unit No setting 4 Use the F1 or F2 button to move the cursor to select the mode number and change the setting number with the F3 or F4 button 5 When the settings are completed press the button to send the setting data from the remote controller to the indoor units 6 When the transmission is ...

Page 59: ...ttern 2 Note Make the function settings shown in Table 1 on Mr SLIM units as necessary Refer to the Instructions Book when it is necessary to set the settings for CITY MULTI units Table 1 summarizes the setting options for each mode number Refer to the indoor unit Installation Manual for the detailed information about initial settings mode numbers and setting numbers for the indoor units Be sure t...

Page 60: ...s remote controller toward the receiver of the indoor unit and press the h button 3 Set the unit number Press the TEMP button to set the unit number Press 01 to specify the indoor unit whose unit number is 01 Direct the wireless remote controller toward the receiver of the indoor unit and press the min button Notes 1 If a unit number that cannot be recognized by the unit is entered 3 beeps of 0 4 ...

Page 61: ...de number B Fig 3 Direct the wireless remote controller toward the receiver of the indoor unit and press the button Current setting number 1 1 beep 1 second 2 2 beep 1 second each 3 3 beep 1 second each 4 Selecting the setting number Use the button to change the Setting number C Fig 4 Direct the wireless remote controller toward the receiver of the indoor unit and press the button 5 To select mult...

Page 62: ...F1 or F2 button and press the button 3 16 error history records will appear 4 records are shown per page and the top record on the first page indicates the latest error record To delete the error history press the F4 button Delete on the screen that shows error history A confirmation screen will appear asking if you want to delete the error history Press the F4 button OK to delete the history Erro...

Page 63: ...4 button Delete on the screen that shows preliminary error history A confirmation screen will appear asking if you want to delete the preliminary error history Press the F4 button OK to delete the preliminary error history Preliminary error history deleted will appear on the screen Press the button to go back to the Error history menu Preliminary error history Page Delete Error history menu Error ...

Page 64: ...ute will appear will appear if no error history is available 4 Resetting the error history Press the F4 button Reset on the screen that shows the error history A confirmation screen will appear asking if you want to delete the error history Press the F4 button OK to delete the error history If deletion fails Request rejected will appear Unit not exist will appear if no indoor units that are corres...

Page 65: ...ET address B indoor unit and the number of blinks of the OPERATION INDICATOR lamp check is completed f 13 7 3 PAR SL100A E Procedure 1 Press the CHECK button twice CHECK lights and refrigerant address 00 blinks Check that the remote controller s display has stopped before continuing 2 Press the TEMP buttons Select the refrigerant address of the indoor unit for the self diagnosis Note Set refrigera...

Page 66: ...32 There is noise on the transmission line or the indoor unit or another remote controller is faulty Check the transmission line and the other remote controllers NG ALL0 ALL1 Send receive circuit fault The remote controller needs replacing ERC The number of data errors is the discrepancy between the number of bits in the data transmitted from the remote controller and that of the data that was act...

Page 67: ... the button Fixed operation will start Note Stable mode will take approx 20 minutes F1 F2 F3 F4 Check menu Cursor Service menu Error history Diagnosis Smooth maintenance Request code Smooth maintenance Return Smooth maintenance Return Smooth maintenance Return Page Page Page COMP current COMP run time COMP On Off COMP frequency A Hz Hr times Hr Ref address Cool Ref address Cool Ref address Cool Su...

Page 68: ... 01 Outdoor unit Indoor unit 01 Outdoor unit Indoor unit 01 Remote controller Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller Select Request code with the F1 or F2 button and press the button Select Check with the F1 or F2 button and press the button 2 Set the Refrigerant address and Request code Select the item to b...

Page 69: ...69 OCH779 ...

Page 70: ...FICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN Copyright 2021 MITSUBISHI ELECTRIC CORPORATION Published Sep 2021 No OCH779 Made in Japan Specifications are subject to change without notice ...

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